Improvement in rotary pumps



. @tinted 0% www l JAMEs NAUGHTON, or

Letters Patent No. 87,108,

BUFFALO, NEW YORK,- daaa Fama/ry 23, 1869.l

IMPROVEMENT IN ROTARY PUMPS.

The Schedule referred toin th'ese Letters Patent and making part of the same.

To all whom it may concern:

Be it known that I, J AMES NAUGHTcm of the city of Buffalo, in the county of Erie, and State of New York, have invented a certain new and useful Improvement in Rotary Pumps; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making part of this specilcation, in which- Figure l is a centralvertical section of a pump provided with my improvement.

lFigure 2, a plan of the bottom lplate B, with the wings or stops e e.

Like letters designate corresponding parts.

My improvement relates to that class of pumps by which the water is elevated by means of a screw, or spiral wings attached to a revolving shaft, within a suitable barrel or case. I

The invention consists in the construction and arrangement of a base-plate, Ahaving ledges or stops c, in combination with an annular induction-opening between the former and the cylinder-case, whereby the water is prevented from acquiring a rotary motion in the direction-ofthe screw.

In the drawings- A represents the barrel or case of a pump, such as may be employed'in pumping water out of a vessel.

B is the screw-shaft, with suitable .bearing `at the top, its foot resting in a suitable step, c, in the centre ofthe base-plate D. y

This plate is provided with wings or ledges, c, eX- tending nearly radially from the step c to the circumference of the plate upon which rests the case A, that is secured to the base-plate by means of bolts f, which pass through a flange, at the base of the barrel and the base-plate, as shown in g. l.

To the lower part df the shaft B are attached the spiral wings or blades g, g g, preferably three in number, fitting snugly within the barrel, the llower end of each successively dipping in the water as it rises up in the barrel.

The tendency of the water, as it enters the space t', i between the lower edge of the barrel and the baseplate, is to whirl around the step cin the direction that the shaft revolves, caused by the action of the screw thereon.

This circular motion of the water impairs the eciency of the pump, in lproportion as its velocity ap? proximates to that of the spiral wings g.

By the employment of the ledges e e, preferably three in number, to correspond with the number of scr'ew'- blades, andcurved as shown, the Water, which freely enters the space t' at all points between the circumference of the base-plate and the iiange of the barrel, is guided by them towards the centre, and, as it rises above the stops c, the wings ofthe screw, which just clears their upper edge, elevate it within the barrel,

from whence it is forced through apipe, m, at the top. It will readily lie-perceived, from the foregoing, that pump, in which capacity it is believed to be superior I to other pumps, for the following reasons:

First, it has a large, flat base, D, adapted to rest upon grain, grain-bags, rope, mud, or whatever may be in the hold of the vessel which the pump may be' employed to lighten, and said base prevents, in a measure, the subsidence of the pump,y and the consequent stoppage or clicking up of the induction-opening.

Secondly, its lateral induction, ab'ove the solid base? plate, forms a means of excluding from the pumpbarrel such solid substances as would be drawn into Y the pump (such being the power of this class of pumps) if a direct upward passage into the barrel existed.

The improvement exhibited in this pump, over such as have an open bottom with a directly-upward induction, and such as are mounted upon legs to prevent the closing of the induction by the sinking ofthe pump, will be at oncev obvious to and important in the estimation of those practically acquainted with thebusiness.

I am aware4 that force-pumps have been vprovided with a base, and with lateral inductions above said base, and that the base has been constructed with ribs or ledges; but my device differs from those heretofore constructed, inthat the ribs or ledges ou the baseplate entirely lill the space vertically between the latter andthe elevating-wings, so as to form an effective means of controlling the water as it enters the pump, as before stated.

I am also aware that ribs or ledges have-been applied below the open bottom of a pump, and above the annular inlet-openings between the feet or legs upon which the pump is supported.l

Therefore, I disclaim the employment of a baseplate below the lateral induction, and also the broad idea of applying ribs or ledges to the base-plate of a pump, in which the Water is raised by spiral blades or wings.

Having thus described my invention,

What I claim as new, and desire to secure by Letters Patent, is-

The plate D, constituting a base for the pump-barrel, andleaving an annular induction, t, provided with stops or ledges c c, in combination with the spiral wings g of shaft B, when said parts are arranged to operate in the manner substantially as and for the purpose herein 'set forth.

In witness whereof, I have hereunto signed my name, in the presence of two subscribing witnesses.

JAMES NAUGHTON.

- Witnesses:

W'. IIL-TYLER, Jos. GoNro. 

